A 1:1 ltv is gonna be tough no matter how you shake it.
Bitcoin dips at all and you will have to re-collateralize
Discussion
Not if the lender understands bitcoin. They shouldn’t be requiring additional collateral based on short term price volatility. Just set penalties for early payoff.
Borrowers go underwater on their traditional loans with banks all the time. If the bank is that risk averse, then can always set tight margin call values, but it really isn't necessary to require such low LTV ratios at origination with such pristine collateral like bitcoin.